3. The genetic code is commaless, which means that no codon is reserved for punctuations. It means that after one amino acid is coded, the second amino acid will be automatically, coded by the next three letters and that no letters are wasted as the punctuation marks (Fig.
Summer solstice is the first day of summer - it's usually between June 20th and June 23rd. In 2016, the summer solstice takes place on June 20th. We know it's summer because the earth's axis tilts toward the sun from June to September - this means warmer weather and longer days.
That is, it will have the most daylight of the year. Monday, June 20, is the summer solstice, the day on the calendar with the most daylight for those in the Northern Hemisphere. Here a few things to know as we begin what many consider the first day of summer.